Remove tools/clang (this will break things temporarily).

tools/clang/blink_gc_plugin/tests/class_requires_trace_method.h

Index: tools/clang/blink_gc_plugin/tests/class_requires_trace_method.h
diff --git a/tools/clang/blink_gc_plugin/tests/class_requires_trace_method.h b/tools/clang/blink_gc_plugin/tests/class_requires_trace_method.h
deleted file mode 100644
index 782d80e141dafc43feff82718ed442b9a97ada26..0000000000000000000000000000000000000000
--- a/tools/clang/blink_gc_plugin/tests/class_requires_trace_method.h
+++ /dev/null
@@ -1,59 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CLASS_REQUIRES_TRACE_METHOD_H_
-#define CLASS_REQUIRES_TRACE_METHOD_H_
-
-#include "heap/stubs.h"
-
-namespace blink {
-
-class HeapObject;
-
-class PartObject {
-    DISALLOW_ALLOCATION();
-private:
-    Member<HeapObject> m_obj;
-};
-
-class HeapObject : public GarbageCollected<HeapObject> {
-private:
-    PartObject m_part;
-};
-
-class Mixin : public GarbageCollectedMixin {
-public:
-  virtual void trace(Visitor*) override;
-  Member<Mixin> m_self;
-};
-
-class HeapObjectMixin : public GarbageCollected<HeapObjectMixin>, public Mixin {
-  USING_GARBAGE_COLLECTED_MIXIN(HeapObjectMixin);
-};
-
-class Mixin2 : public Mixin {
-public:
-  virtual void trace(Visitor*) override;
-};
-
-class HeapObjectMixin2
-    : public GarbageCollected<HeapObjectMixin2>, public Mixin2 {
-  USING_GARBAGE_COLLECTED_MIXIN(HeapObjectMixin2);
-};
-
-class Mixin3 : public Mixin {
-public:
-  virtual void trace(Visitor*) override;
-};
-
-class HeapObjectMixin3
-    : public GarbageCollected<HeapObjectMixin3>, public Mixin {
-  USING_GARBAGE_COLLECTED_MIXIN(HeapObjectMixin2);
-public:
-  virtual void trace(Visitor*) override;
-};
-
-}
-
-#endif